Considering how the story goes, there is no way to wrap it up nicely in a 12 or 24 ep anime. Make up some shitty ending is the only way it happen which would be disappointing. Sticking with the story for 1 or 2 seasons would just leave people hanging at the end. There is no real resolution to the arcs, as the main problem will exist till they escape.

Plenty of animes that have lasted more than 12 or 24 episodes. Can easily make it one of those animes that run longer.

Seriously, all those people die and betray each other, and they go through so many mental traumas all just because some stupid guy and a mom were like "lets make a giant island tribute to them where it would have been nice if they could have crash landed on it to survive, and then lets put ferocious man-eating dinosaurs on it"

Cage of eden is great BUT..... since it ended it chances of getting an anime are very low. if it hadn't even been disccused (an anime project idea) before the manga ended then idd say it has a super low chance of becomeing an anime